Junos Troubleshooting in the NOC (JTNOC)

Course Level

Junos Troubleshooting in the NOC (JTNOC) is an introductory-level course.

Intended Audience

The course content is aimed at operators of devices running the Junos OS in a NOC environment. These operators include network engineers, administrators, support personnel, and reseller support personnel.

Prerequisites

Students should have basic networking knowledge and an understanding of the Open Systems Interconnection (OSI) reference model and the TCP/IP protocol suite. Students should also attend the Introduction to the Junos Operating System (IJOS) course, or have equivalent experience prior to attending this class.

Objectives

After successfully completing this course, you should be able to:

• Reduce the time it takes to identify and isolate the root cause of an issue impacting your network.
• Gain familiarity with Junos products as they pertain to troubleshooting.
• Become familiar with online resources valuable to Junos troubleshooting.
• Gain familiarity with Junos tools used in troubleshooting.
• Identify and isolate hardware issues.
• Troubleshoot problems with the control plane.
• Troubleshoot problems with interfaces and other data plane components.
• Describe the staging and acceptance methodology.
• Troubleshoot routing protocols.
• Describe how to monitor your network with SNMP, RMON, Junos Traffic Vision (formerly known as JFlow), and port mirroring.
• Become familiar with JTAC procedures.

Course Contents

Day 1

Chapter 1: Course Introduction

Chapter 2: Troubleshooting as a Process

• Before You Begin
• The Troubleshooting Process
• Challenging Network Issues
• The Troubleshooting Process Lab

Chapter 3: Junos Product Families

• The Junos OS
• Control Plane and Data Plane
• Field-Replaceable Units
• Junos Product Families
• Lab: Identifying Hardware Components

Chapter 4: Troubleshooting Toolkit

• Troubleshooting Tools
• Best Practices
• Lab: Using Monitoring Tools and Establishing a Baseline

Day 2

Chapter 5: Hardware and Environmental Conditions

• Hardware Troubleshooting Overview
• Memory and Storage
• Boot Monitoring
• Hardware-Related System Logs
• Chassis and Environmental Monitoring
• Lab: Monitoring Hardware and Environmental Conditions

Chapter 6: Control Plane

• Control Plane Review
• System and User Processes
• Monitoring Routing Tables and Protocols
• Monitoring Bridging
• Monitoring the Address Resolution Protocol
• Lab: Control Plane Monitoring and Troubleshooting

Chapter 7: Control Plane Protection

• Protection Overview
• DDOS Protection
• Loopback Filter
• Lab: Control Plane Monitoring and Troubleshooting

Chapter 8: Data Plane – Interfaces

• Interface Properties
• General Interface Troubleshooting
• Ethernet Interface Troubleshooting
• Lab: Monitoring and Troubleshooting Ethernet Interfaces

Day 3

Chapter 9: Data Plane – Other Components

• Definition of a Data Plane Problem
• Data Plane Components
• Data Plane Forwarding
• Load-Balancing Behavior
• Firewall Filters and Policers
• Data Plane Troubleshooting Case Study
• Lab: Isolate and Troubleshoot PFE Issues

Chapter 10: Staging and Acceptance Testing

• Initial Inspection and Power-on
• General System Checks
• Interface Testing

Chapter 11: Troubleshooting Routing Protocols

• Troubleshooting OSPF
• Troubleshooting BGP
• Troubleshooting Routing Loops and Route Oscillation
• Lab: Troubleshooting Routing Protocols

Chapter 12: High Availability

• High Availability Overview
• Graceful Routing Engine Switchover
• Graceful Restart
• Nonstop Active Routing and Bridging
• Unified In-Service Software Upgrade

Day 4

Chapter 13: Network Monitoring

• SNMP
• RMON
• Telemetry
• Flow Monitoring
• Lab: Monitoring the Network

Chapter 14: vMX Troubleshooting

• vMX Overview
• Troubleshooting
• Lab: Monitoring vMX

Chapter 15: JTAC Procedures

• Opening a Support Case
• Customer Support Tools
• The Content of a PR
• Transferring Files to JTAC

Chapter 16: Automated Support and Prevention

• Overview
• Service Now
• Service Insight
• Lab: Automated Support and Prevention

Appendix A: Interface Troubleshooting

• Interface Troubleshooting Chart
• Troubleshooting Various Interface Types